I'm a undergraduate student with expertise in these subjects,As who can probably guide better then one who did O-level & A-level himself. O-Level Courses offered = Biology, Math, Physics (My Grades were: Biology=A , Math=A , Physics=A* , English=A , Chemistry=B) A-Level Courses offered = Math (My Grades were: Biology=A , Math=A* , Physics=B , chemistry=B)